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Abstract
Hollow carbon nanospheres (HCNS) were prepared from carbon black (CB) derived from spent tyre pyrolysis oil. The pristine CB produced by partial oxidation of the pyrolysis oil in a drop tube furnace was subsequently oxidised in air in a fixed bed reactor to yield HCNS. The effect of oxidation temperature (300 to 700°C) and time (1 to 8 h) on the burn-off (Bt) of the sample over the duration (t) of oxidation and average reaction rate (Rt) was assessed. The BET surface area and pore volume and the nanostructure of the HCNS samples obtained were characterised using N2 adsorption–desorption and high-resolution transmission electron microscope (HRTEM) techniques, respectively. Higher temperature and longer oxidation time led to higher Bt. As Bt increased, the BET surface area and pore volume initially increased linearly due to the removal of the amorphous core and then decreased because of the collapse of the shell of the carbon nanostructure. At Bt of ~56%, the maximum BET surface area and pore volume of the HCNS were 383.2 m2 g−1 and 0.39 cm3 g−1, respectively, compared to ~19.5 m2 g−1 and 0.033 cm3 g−1 of the pristine CB. The HRTEM images indicate that the change in BET surface area corresponds to the formation of the HCNS, as the core of the CB particle was preferentially consumed to create a hollow structure. The formation of HCNS follows an internal oxidation model, which is characterised by rapid core consumption and relatively slow shell consumption.
Original language | English |
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Article number | e3054 |
Number of pages | 12 |
Journal | Asia-Pacific Journal of Chemical Engineering |
Volume | 19 |
Issue number | 3 |
Early online date | 3 Mar 2024 |
DOIs | |
Publication status | Published - 1 May 2024 |
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Dive into the research topics of 'Preparation of hollow carbon nanospheres from oxidation of spent tyre oil-derived carbon black in air'. Together they form a unique fingerprint.Projects
- 1 Finished
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Manufacturing High Value Carbon Products and Chemicals from Spent Tyres
Zhang, D. (Investigator 01), Liu, Y. (Investigator 02), Yang, H. (Investigator 03) & Yu, J. (Investigator 04)
ARC Australian Research Council , Keshi Technologies Pty Ltd
1/01/16 → 31/12/21
Project: Research